Security issues

[serzhik]

I wanted to try it but security report by Claude Code said it is not secure:

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Vulnerability Analysis Report

I've completed a comprehensive security analysis of your Bitbucket MCP
server. Here are the critical vulnerabilities found:

🔴 HIGH SEVERITY VULNERABILITIES

1. Credential Exposure in Process Memory (server.js:189-198)

• Issue: Bitbucket credentials stored in environment variables are
  readable in process memory
• Risk: Memory dumps could expose credentials
• Impact: Full Bitbucket account compromise

2. Hardcoded Authorization Header Recreation (server.js:357-360)

• Issue: Basic auth credentials recreated inline instead of using
  existing method
• Risk: Code duplication increases credential exposure surface
• Impact: Additional credential leak vectors

3. Unvalidated External API Responses (server.js:213)

• Issue: Raw JSON responses from Bitbucket API returned without
  sanitization
• Risk: Potential XSS or injection if responses contain malicious content
• Impact: Client-side code execution

4. URL Injection Vulnerability (server.js:219-230, 281-293)

• Issue: User input directly concatenated into API URLs without proper
  validation
• Risk: Attackers can manipulate API endpoints
• Impact: Unauthorized API access, data exfiltration

🟡 MEDIUM SEVERITY VULNERABILITIES

5. Information Disclosure in Error Messages (server.js:179-184)

• Issue: Detailed error messages expose internal implementation details
• Risk: Information leakage aids reconnaissance
• Impact: Enhanced attack surface mapping

6. No Rate Limiting

• Issue: No protection against API abuse
• Risk: DoS attacks, credential exhaustion
• Impact: Service unavailability

7. Missing Input Validation (server.js:216-230)

• Issue: No validation of date formats, workspace names, or repository
  slugs
• Risk: Malformed requests could cause unexpected behavior
• Impact: Application instability

⏺ Update Todos
⎿  ☒ Explore project structure and identify key files
☒ Analyze authentication and authorization mechanisms
☒ Check for input validation vulnerabilities
☒ Review API endpoints for security issues
☒ Examine configuration files for sensitive data exposure
☒ Check dependencies for known vulnerabilities
☒ Review logging and error handling for information disclosure
☒ Analyze file upload/download functionality if present

⏺ ✅ POSITIVE SECURITY FINDINGS

• No known vulnerabilities in dependencies
• No file upload/download functionality (reduces attack surface)
• Uses established MCP SDK framework
• No hardcoded secrets in code (uses environment variables)

🔧 RECOMMENDED SECURITY FIXES

1. Implement input validation for all user inputs
2. Add URL encoding/sanitization before API calls
3. Implement rate limiting
4. Sanitize API responses before returning
5. Use generic error messages
6. Add request timeout handling
7. Implement proper logging without credential exposure

The most critical issues are the credential handling and URL injection vulnerabilities that
should be addressed immediately.